EVALUATION KIT AVAILABLE Click here to ask an associate for production status of specific part numbers. 2 MAX31343 5ppm, I C Real-Time Clock with Integrated MEMS Oscillator General Description Benefits and Features 2 The MAX31343 is a low-cost, extremely accurate, I C re- Highly Accurate RTC with Integrated MEMS al-time clock (RTC). The device incorporates a battery in- Resonator Completely Manages All Timekeeping put and maintains accurate timekeeping when main power Functions to the device is interrupted. The integration of the micro- Complete Clock Calendar Functionality Including electromechanical systems (MEMS) resonator enhances Seconds, Minutes, Hours, Day, Date, Month, Year, the long-term accuracy of the device and eliminates the and Century with Leap-Year Compensation up to external crystal requirement in the system. The Year 2199 MAX31343 is available in the 8-pin WLP and TDFN pack- Timekeeping Accuracy 5ppm (0.432 second/day) ages. from -40C to +85C Two Time-of-Day Alarms The RTC maintains seconds, minutes, hours, day, date, Temperature-Compensated Programmable Square- month, year, and century information. The date at the end Wave Output of the month is automatically adjusted for months with Uncompensated Programmable Clock Outputs fewer than 31 days, including corrections for leap year Automatically Switch over to Backup Battery or up to year 2199. The clock operates in the 24-hour for- Supercapacitor on Power-Fail mat. Other features including two programmable time-of- Digital Temperature Sensor with 3C Accuracy day alarms, interrupt output, uncompensated programma- +1.6V to +5.5V Supply Voltage ble clock output, and temperature-compensated program- mable square-wave output. Address and data are trans- 64-Byte RAM for User Data Storage 2 ferred serially through an I C bidirectional bus. A voltage Simple Serial Interface Connects to Most reference and comparator circuit monitors the status of Microcontrollers 2 V to detect power failures and automatically switch to I C Interface CC the backup supply when necessary. See the Typical Ap- Battery-Backup Input for Continuous Timekeeping plication Circuit for more details. Low-Power Operation Extends Battery-Backup Runtime Applications Operating Temperature Range: -40C to +85C Industrial 2.1mm x 2.3mm, 8-Pin WLP Package Action Cameras 4mm x 3mm, 8-Pin TDFN Package Communications Underwriters Laboratories (UL) Recognized Handheld Instrumentation Power Meters Wearables Ordering Information appears at end of data sheet. Underwriters Laboratories Inc. is a registered certification mark of 19-100717 Rev 5 11/21 Underwriters Laboratories Inc. 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 2021 Analog Devices, Inc. All rights reserved.2 MAX31343 5ppm, I C Real-Time Clock with Integrated MEMS Oscillator Simplified Block Diagram MMAAXX3311334433 V POWER CONTROL CC CLKO OSCILLATOR AND TRICKLE VBAT N/FRAC-N CHARGER DIVIDE R SQW SQW MEMS V CC POR RESONATOR INTERNA L DIGITA L 1Hz ADJUSTMENT INT CONTROL TEMP SENSOR FACTORY TRIM GND SDA 2 I C CLOCK/CALENDAR REGISTE RS (CONFIG, SCL WITH ALARM INTERFACE STATUS) AND SRAM www.analog.com Analog Devices 2